Its dumb how you have to go through big ben and k lab to just find the cats. It takes awhile to finish the thing and trying to find the cats is longer!
what i do is just get the cat finding quest before then i go through and find them on the way :-D it works for me. or if you have arlready done mb find a friend that is working on it and help him and get the cats at the same time (just dont tell him its the only reason lol 8)
Its all in playing the game. still didn't say where the Cat is ?